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US 8,791,424 B2Granted
Control grid design for an electron beam generating device
AssigneeTetra Laval Holdings & Finance S.A.
InventorDominique Cloetta
Life of this patent
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Abstract
The invention relates to a control grid for an electron beam generating device, wherein the control grid comprises apertures arranged in rows in a width direction and columns in a height direction, wherein a majority of the apertures in a row have the same size, and wherein the size of the apertures of at least one row differs from the size of the apertures of another row.
Claims4
A control grid for an electron beam generating device comprising:
- a plurality of hexagonal-shaped apertures arranged in rows and columns, each row extending parallel to a longitudinal axis of the control grid, each column extending orthogonal to the longitudinal axis of the control grid, each of the hexagonal-shaped apertures possessing a width extending parallel to the longitudinal axis of the control grid and a height extending orthogonal to the longitudinal axis of the control grid;
- and
- a majority of the hexagonal-shaped apertures in each individual row possess the same height and the same width, the height of at least some of the hexagonal-shaped apertures in a first one of the rows differs from the height of at least some of the hexagonal-shaped apertures in a second one of the rows, and the width of at least some of the hexagonal-shaped apertures in the first one of the rows is the same as the width of at least some of the hexagonal-shaped apertures in the second one of the rows.
Dependencies are inferred from the claim text.